Identifying Flaws in Components during Creation with Ready-Made spec.ts Files

Question

Identifying Flaws in Components during Creation with Ready-Made spec.ts Files

Currently, I have embarked on the journey of creating unit tests for my Angular Material project. At the moment, my focus is on testing whether the pre-made spec.ts files for each component are passing successfully. Despite the fact that my project compiles and runs without any issues, when running ng test and checking the results in the Karma Runner, it appears that most of my components are failing on their basic pre-made spec.ts files. Strangely enough, the errors displayed seem to be related to compiler issues, even though my project has no trouble compiling.

The following are some examples of these errors:

Failed: Template parse errors:
Can't bind to 'ngModel' since it isn't a known property of 'input'. ("<mat-form-field class="form-field wide">

Failed: Template parse errors:
'mat-toolbar' is not a known element:
1. If 'mat-toolbar' is an Angular component, then verify that it is part of this module.

It seems that these errors specifically involve Angular Material. Could it be possible that my tests are unaware of the fact that Angular Material has been installed?

angular typescript jasmine

Answer 1

Answer №1

I've observed that the errors I'm encountering are related to Angular Material. Could it be possible that my tests are not recognizing the presence of Angular Material in the project?

Absolutely!

Each Jasmine test must have its own module declared with all dependencies included. Therefore, you will need to incorporate your material modules into TestBed.

beforeEach(async(() => {
    TestBed.configureTestingModule({
        imports: [MatToolbarModule, /*other required modules*/],
        declarations: [/*all component declarations*/]
    }).compileComponents();
}));

Additionally, consider using a Material module that encompasses all the necessary Angular Material dependencies for your application, like so:

import { CommonModule } from '@angular/common';
import { NgModule } from '@angular/core';
import { MatButtonModule } from '@angular/material/button';
import { MatButtonToggleModule } from '@angular/material/button-toggle';
import { MatCardModule } from '@angular/material/card';
import { MatIconModule } from '@angular/material/icon';
import { MatListModule } from '@angular/material/list';
import { MatMenuModule } from '@angular/material/menu';
import { MatSelectModule } from '@angular/material/select';
import { MatTableModule } from '@angular/material/table';
import { MatTabsModule } from '@angular/material/tabs';
import { MatToolbarModule } from '@angular/material/toolbar';

@NgModule({
    imports: [CommonModule],
    exports: [
        MatButtonModule,
        MatButtonToggleModule,
        MatCardModule,
        MatIconModule,
        MatListModule,
        MatMenuModule,
        MatSelectModule,
        MatTableModule,
        MatTabsModule,
        MatToolbarModule
    ]
})
export class MaterialModule {}

By importing the Material module in other modules/tests, managing dependencies will become more streamlined and efficient.

beforeEach(async(() => {
    TestBed.configureTestingModule({
        imports: [MaterialModule, /*other required modules*/],
        declarations: [/*all component declarations*/]
    }).compileComponents();
}));

Answer 2

I've observed that the errors I'm encountering are related to Angular Material. Could it be possible that my tests are not recognizing the presence of Angular Material in the project?

Absolutely!

Each Jasmine test must have its own module declared with all dependencies included. Therefore, you will need to incorporate your material modules into TestBed.

beforeEach(async(() => {
    TestBed.configureTestingModule({
        imports: [MatToolbarModule, /*other required modules*/],
        declarations: [/*all component declarations*/]
    }).compileComponents();
}));

Additionally, consider using a Material module that encompasses all the necessary Angular Material dependencies for your application, like so:

import { CommonModule } from '@angular/common';
import { NgModule } from '@angular/core';
import { MatButtonModule } from '@angular/material/button';
import { MatButtonToggleModule } from '@angular/material/button-toggle';
import { MatCardModule } from '@angular/material/card';
import { MatIconModule } from '@angular/material/icon';
import { MatListModule } from '@angular/material/list';
import { MatMenuModule } from '@angular/material/menu';
import { MatSelectModule } from '@angular/material/select';
import { MatTableModule } from '@angular/material/table';
import { MatTabsModule } from '@angular/material/tabs';
import { MatToolbarModule } from '@angular/material/toolbar';

@NgModule({
    imports: [CommonModule],
    exports: [
        MatButtonModule,
        MatButtonToggleModule,
        MatCardModule,
        MatIconModule,
        MatListModule,
        MatMenuModule,
        MatSelectModule,
        MatTableModule,
        MatTabsModule,
        MatToolbarModule
    ]
})
export class MaterialModule {}

By importing the Material module in other modules/tests, managing dependencies will become more streamlined and efficient.

beforeEach(async(() => {
    TestBed.configureTestingModule({
        imports: [MaterialModule, /*other required modules*/],
        declarations: [/*all component declarations*/]
    }).compileComponents();
}));

Identifying Flaws in Components during Creation with Ready-Made spec.ts Files

Answer №1

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